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v3.21.1

Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Jun. 30, 2020
Revenue, Performance Obligation [Abstract] |  |  |  |  |
Revenue, Remaining Performance Obligation, Amount | $ 444,500 |  | $ 444,500 |  |
Performance obligations to be recognized as revenue within next twelve months | 340,800 |  | 340,800 |  |
Contract with Customer, Asset and Liability [Abstract] |  |  |  |  |
Costs and estimated earnings in excess of billings on uncompleted contracts | 37,964 |  | 37,964 |  | $ 59,548
Change in CIE |  |  | (21,584) |  |
Billings on uncompleted contracts in excess of costs and estimated earnings | (59,495) |  | (59,495) |  | (63,889)
Change in BIE |  |  | 4,394 |  |
Change in net contract balances |  |  | (17,190) |  |
Contract with customer, current liability, net | (21,531) |  | (21,531) |  | (4,341)
Contract with Customer, Liability, Revenue Recognized |  |  | 57,900 |  |
Disclosure Customer Contracts Additional Information [Abstract] |  |  |  |  |
Construction Contractor, Receivable, Retainage, Year One | 20,700 |  | 20,700 |  | 37,300
Construction Contractor, Receivable, Retainage, after Year One | 3,800 |  | 3,800 |  | $ 1,600
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from Contract with Customer | 148,260 | $ 248,327 | 498,499 | $ 905,101 |
Utility and Power Infrastructure [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Loss on Contracts |  |  | 8,900 |  |
Storage and Terminal Solutions |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Loss on Contracts |  |  | 3,800 |  |
Fixed-price Contract |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from Contract with Customer | 96,412 | 182,282 | 343,639 | 533,375 |
Time-and-materials Contract |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from Contract with Customer | 51,848 | 66,045 | 154,860 | 371,726 |
United States |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from Contract with Customer | 138,001 | 232,606 | 445,578 | 838,371 |
Canada |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from Contract with Customer | 8,930 | 12,633 | 47,673 | 58,506 |
Other international |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue from Contract with Customer | $ 1,329 | $ 3,088 | $ 5,248 | $ 8,224 |

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